typing: minor improvements

src/_pytest/_code/code.py

@@ -921,7 +921,7 @@ def __str__(self) -> str:
     def __repr__(self) -> str:
         return "<{} instance at {:0x}>".format(self.__class__, id(self))
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         raise NotImplementedError()
 
 
@@ -932,7 +932,7 @@ def __init__(self) -> None:
     def addsection(self, name: str, content: str, sep: str = "-") -> None:
         self.sections.append((name, content, sep))
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         for name, content, sep in self.sections:
             tw.sep(sep, name)
             tw.line(content)
@@ -952,7 +952,7 @@ def __init__(
         self.reprtraceback = chain[-1][0]
         self.reprcrash = chain[-1][1]
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         for element in self.chain:
             element[0].toterminal(tw)
             if element[2] is not None:
@@ -969,7 +969,7 @@ def __init__(
         self.reprtraceback = reprtraceback
         self.reprcrash = reprcrash
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         self.reprtraceback.toterminal(tw)
         super().toterminal(tw)
 
@@ -987,7 +987,7 @@ def __init__(
         self.extraline = extraline
         self.style = style
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         # the entries might have different styles
         for i, entry in enumerate(self.reprentries):
             if entry.style == "long":
@@ -1019,7 +1019,7 @@ class ReprEntryNative(TerminalRepr):
     def __init__(self, tblines: Sequence[str]) -> None:
         self.lines = tblines
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         tw.write("".join(self.lines))
 
 
@@ -1038,7 +1038,7 @@ def __init__(
         self.reprfileloc = filelocrepr
         self.style = style
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         if self.style == "short":
             assert self.reprfileloc is not None
             self.reprfileloc.toterminal(tw)
@@ -1071,7 +1071,7 @@ def __init__(self, path, lineno: int, message: str) -> None:
         self.lineno = lineno
         self.message = message
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         # filename and lineno output for each entry,
         # using an output format that most editors understand
         msg = self.message
@@ -1086,7 +1086,7 @@ class ReprLocals(TerminalRepr):
     def __init__(self, lines: Sequence[str]) -> None:
         self.lines = lines
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         for line in self.lines:
             tw.line(line)
 
@@ -1095,7 +1095,7 @@ class ReprFuncArgs(TerminalRepr):
     def __init__(self, args: Sequence[Tuple[str, object]]) -> None:
         self.args = args
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         if self.args:
             linesofar = ""
             for name, value in self.args:

src/_pytest/doctest.py

@@ -13,6 +13,8 @@
 from typing import Tuple
 from typing import Union
 
+import py
+
 import pytest
 from _pytest import outcomes
 from _pytest._code.code import ExceptionInfo
@@ -137,7 +139,7 @@ def __init__(
     ):
         self.reprlocation_lines = reprlocation_lines
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         for reprlocation, lines in self.reprlocation_lines:
             for line in lines:
                 tw.line(line)

src/_pytest/fixtures.py

@@ -751,7 +751,7 @@ def __init__(self, filename, firstlineno, tblines, errorstring, argname):
         self.firstlineno = firstlineno
         self.argname = argname
 
-    def toterminal(self, tw) -> None:
+    def toterminal(self, tw: py.io.TerminalWriter) -> None:
         # tw.line("FixtureLookupError: %s" %(self.argname), red=True)
         for tbline in self.tblines:
             tw.line(tbline.rstrip())

src/_pytest/main.py

@@ -15,6 +15,7 @@
 from _pytest.config import directory_arg
 from _pytest.config import hookimpl
 from _pytest.config import UsageError
+from _pytest.fixtures import FixtureManager
 from _pytest.outcomes import exit
 from _pytest.runner import collect_one_node
 from _pytest.runner import SetupState
@@ -377,7 +378,10 @@ def __missing__(self, path: str) -> str:
 class Session(nodes.FSCollector):
     Interrupted = Interrupted
     Failed = Failed
+    # Set on the session by runner.pytest_sessionstart.
     _setupstate = None  # type: SetupState
+    # Set on the session by fixtures.pytest_sessionstart.
+    _fixturemanager = None  # type: FixtureManager
 
     def __init__(self, config):
         nodes.FSCollector.__init__(

src/_pytest/nodes.py

@@ -80,7 +80,7 @@ class Node:
 
     def __init__(
         self,
-        name,
+        name: str,
         parent: Optional["Node"] = None,
         config: Optional[Config] = None,
         session: Optional["Session"] = None,

testing/code/test_excinfo.py

@@ -857,7 +857,7 @@ def test_reprexcinfo_unicode(self):
         from _pytest._code.code import TerminalRepr
 
         class MyRepr(TerminalRepr):
-            def toterminal(self, tw) -> None:
+            def toterminal(self, tw: py.io.TerminalWriter) -> None:
                 tw.line("я")
 
         x = str(MyRepr())